水下航行体舱段结构声学设计模型分析  

Structural-Acoustic Analysis on the Cabin of Underwater Vehicle

作　　者：艾海峰[1] 陈志坚[1] 王路[2] 

机构地区：[1]海军工程大学船舶与动力学院 [2]海军装备研究院舰船论证研究所

出　　处：《中国舰船研究》2010年第6期12-15,共4页Chinese Journal of Ship Research

基　　金：国防"十一五"预研项目(4011101020101)

摘　　要：采用基于模态坐标的有限元/边界元方法,建立水下航行体封闭舱段声学设计模型,利用该耦合分析模型对两端采用刚性圆板封闭的简支舱段结构的振声性能进行分析,并与采用半无限长圆柱形刚性障板代替两端的刚性圆板时的舱段模型计算结果作比较,指出除了少数耦合模态的固有频率附近,当外层圆柱壳周长相对流体中声波波长较小时,采用刚性圆板封闭的两端简支双层加筋圆柱壳与两端采用半无限长圆柱形刚性障板代替刚性圆板时的声辐射规律十分相近。The structural-acoustic design model for an enclosed cabin section of underwater vehicle was built up using FEM/BEM method based on modal coordinates,the vibration and sound radiation characteristics were analyzed by this coupled design model for the simple supported finite cylindrical shell ended with rigid circular plates.The results were compared with that of substituting semi-infinite rigid cylindrical baffles for the rigid circular plates.It demonstrates that as the perimeter of the outer cylindrical shell is smaller compared to the wavelength of sound in ambient fluid,the sound radiation law of the simple supported and stiffened double cylindrical shell ended with rigid circular plates is similar with that extended by two semi-infinite length rigid cylindrical baffles,except the case that is near the natural frequencies of a few coupled modes.

关 键 词：舱段 有限元/边界元 双层加筋圆柱壳 声辐射 

分 类 号：U661.44[交通运输工程—船舶及航道工程]